PFlow

A free easing-curve editor for EffectCraft. Draw a Bezier curve, save it as a preset, and apply it to your selected keyframes in one click.

Special thanks to @ahmadyacz for the new PFlow UI

Independent, unofficial community script by Puuncture. Not affiliated with or endorsed by the EffectCraft authors or any other panel or company. Written from scratch against After Effects' documented scripting API, so it should also run in After Effects.

Features

• Visual curve editor. Drag the two handles; hold Shift to snap to 0.05. Double-click the graph to reset to Linear.
• Type or paste values. Click the coordinate readout to enter x1, y1, x2, y2 or paste a CSS cubic-bezier(0.4, 0, 0.2, 1). The readout uses two decimal places; opening the editor preserves the curve's full precision.
• Apply to keyframes. Eases every pair of neighbouring selected keyframes, on any property (position, scale, opacity, shapes...), in one undo step. Speeds are scaled to each segment, so one curve fits any distance and duration.
• Apply to both sides, only the out side (first key), or only the in side (second key).
• Live mode. Re-applies the curve whenever you release a handle or pick a preset.
• From Keys. Reads the curve of the selected keyframes back into the editor.
• Flip. Reverses the curve.
• Thumbnail preset library. Preview each easing curve; the selected preset is highlighted in blue. Choose default (25 reference curves), custom (saved curves), or all (all built-ins and saved curves). The extra Sine, CSS Ease, and Material presets remain available under all.
• 30 built-in presets: Sine, Quad, Cubic, Quart, Quint, Expo, Circ and Back (In / Out / In-Out), plus Linear, Ease In, Ease Out, Ease In-Out, CSS Ease and Material Standard.
• Your own presets. Press + or the star to name and save a curve. The pencil and delete icons manage the selected custom preset. Presets are stored in EffectCraft's script settings and survive restarts.
• Dark two-column layout. Host-aware colors match EffectCraft's dark panels without bright gray canvas backgrounds. Vector toolbar icons have hover and pressed feedback.
• Preset scrolling. Drag vertically within the gallery, drag the slim scroll thumb, or click its up/down arrows. Wheel scrolling is also supported on hosts that forward wheel events to scripts. The current EffectCraft ScriptUI bridge does not forward them.
• Host sizing. EffectCraft uses a compact 480 × 340 layout to avoid the previous oversized outer scroll area. Its current ScriptUI bridge does not notify scripts when a dock is resized, so automatic graph resizing there is limited by the host. Hosts that deliver resize callbacks reflow the panel normally.

Requirements

EffectCraft with ScriptUI panel support (any recent version). No other dependencies.

Install

Option A: from the menu (easiest)

1. Download PFlow.jsx from the latest release (or from the ScriptUI Panels folder).
2. In EffectCraft choose File > Scripts > Install ScriptUI Panel... and select PFlow.jsx.
3. Open it from the bottom of the Window menu: Window > PFlow.jsx. Dock it wherever you like; EffectCraft reopens it on the next launch.

Option B: copy the file Put PFlow.jsx into the Scripts/ScriptUI Panels/ folder inside EffectCraft's settings folder, then restart EffectCraft:

OS	Settings folder
Windows	%APPDATA%\EffectCraft
macOS	~/Library/Application Support/EffectCraft
Linux	~/.config/effectcraft (or $XDG_CONFIG_HOME/effectcraft)

How to use

1. Select two or more neighbouring keyframes on a property in the timeline.
2. Click a curve thumbnail or shape the curve with the yellow handles, then press APPLY. Double-clicking a thumbnail loads and applies it immediately.
3. Use the three buttons to the left of APPLY to choose outgoing, both (the default), or incoming easing.
4. Press the capture icon to the left of the coordinates to read the selected keyframes into the editor. Click the coordinates to edit or paste a curve.
5. The library toolbar provides + (save), pencil (rename), reverse arrows (flip), power (toggle Live), and trash (delete). Hover over a control for its tooltip.

To save a preset, set the curve, click + or the star, and enter a name. To rename or delete it, select its thumbnail in the custom library first. Saving over an existing custom preset or deleting one asks for confirmation.

Notes

• Select neighbouring keyframes (for example keys 1 and 2, or 2 and 3). Keys that aren't next to each other are skipped.
• Keyframes on locked layers are skipped.
• EffectCraft can't yet bind keyboard shortcuts to individual scripts, so PFlow opens from the Window menu.

License

MIT, see LICENSE. Copyright (c) 2026 Puuncture.